Time Until Buzzers Sync Again
Number Theory · Math Count PH 2024
A red, blue, and green buzzer buzzed at the same time, at 4:00 PM. Thereafter, the red buzzer buzzes every 20 seconds, the blue buzzer every 45 seconds, and the green buzzer every 70 seconds. What is the shortest number of minutes after 4:00 PM will all three buzzers buzz again at the same time?